Region
United States --
13
United States
12
California
1
California --
1
Central America
1
Central America --
1
China --
1
Cuba
1
Cuba --
1
Europe
1
Europe --
1
Japan
1
Japan --
1
Japan. Rikugan. Kantogun. Butai, Dai 731 --
1
Malaya
1
Malaya --
1
Manchuria
1
Manchuria (China) --
1
Singapore
1
Singapore --
1
United States. Air Force --
1
United States. Continental Army --
1
United States. Continental Congress --
1
United States. Navy --
1
Vietnam
1
Vietnam --
1